As reported here over the past few days, It was president Obama’s intention to have the UN Security Council approve the removal of the sanctions per the schedule in the deal, as early as next week, prior Congress voting the deal up or down. On Thursday, Senator Ted Cruz (R-TX) sent a letter to the president warning him of his intention to hold reauthorizing legislation and block all nominees for the U.S. State Department unless the President provides written assurances that he will block any U.N. Security Council resolution approving the Iranian nuclear deal until the legislative timeline for Congressional review has run its course.
At the same time Cruz was sending his letter U.N. Ambassador Rice was circulating a draft UN Security Council resolution was circulated by the United States yesterday. The resolution would nuclear agreement effectively lifting the sanctions imposed by the U.N. per the deal.. The resolution would facilitate any one of the P5+1 partners to to use their security council veto to reinstate sanctions against Iran if it is seen to be violating the deal.
With the Security Council lifting the sanctions (the resolution will most certainly pass) the congressional vote becomes much less meaningful.